(Choose 1 answer)
When is a set of functional dependencies F said to be minimal?
a)Every dependency in F has a single attribute for its right hand side
b)
We cannot replace any dependency X -> A in F with other dependency Y->A where Y is a proper subset
of X and the changed set of dependencies is still equivalent to F
c)We cannot remove any dependency from F and still have set of dependencies that is equivalent to F
d)Every dependency in F has two attributes for its right hand side
A. (a), (b) and (c)
B. (a) and (b)
C. (b) and (c)
D. (a) and (c)
E. (b), (c) and (d)
